| Integrated energy system has attracted widespread attention because of its outstanding advantages in cascade utilization of energy and complementary utilization of energy.Integrated demand response has been studied by many experts and scholars because it can optimize load curve and alleviate the pressure of system energy supply.However,in most literatures,gas or coal-fired units are mainly selected as the cogeneration units of the system to ensure the reliability of energy supply,which makes the system not only consume fossil energy,but also emit harmful substances.At the same time,most literatures considering the integrated demand response mainly take the economy of system operation as the optimization goal,which may lead to the system ignoring the user’s energy consumption experience in order to pursue the optimal economic operation.In addition,with the proposal of carbon peaking and carbon neutrality goals,how to reduce the carbon emission during system operation is also a research hotspot in recent years.In view of the above problems,this paper studies the optimal operation of the system by considering demand response,source-load uncertainty and carbon trading.The main tasks are as follows:Building a low-carbon energy supply system around concentrating solar power plant.Firstly,take the concentrating solar power plant and its heat storage device as the cogeneration unit,cooperate with wind power generators,photovoltaic panels and other energy equipments to build a low-carbon energy supply system,and establish the output model of the system.Then,according to the output characteristics and coupling relationship of energy equipments,a system operation strategy is formulated.Considering the characteristics of heterogeneous energy such as electricity,heat and gas in the system,the mixed time scale is selected to schedule the system.Finally,an example is given to verify the operation economy and low-carbon energy supply of the system.Establish a integrated demand response mechanism considering load deviation degree.Firstly,the basic concepts and main types of integrated demand response are introduced,and the ways of different loads participating in integrated demand response are analyzed.Then the load is classified,and the energy consumption model is established according to the energy consumption characteristics of the load.The concept of load deviation degree is proposed to measure the energy consumption experience of users when participating in integrated demand response.Finally,by setting the comparison schemes,it is verified that the integrated demand response can effectively improve the load curve,alleviate the pressure of system energy supply and reduce the operation cost of the system.The load deviation degree can effectively limit the impact of integrated demand response on users,and make the system take into account the operation economy and users’ energy consumption experience.Considering the impact of uncertain factors on the operation of the system,the carbon trading is introduced into the integrated energy system.Firstly,the influence of source-load uncertainty on system operation is analyzed.Then it introduces the mathematical theory of fuzzy chance constrained programming and the specific method of using this theory to deal with the fuzzy variables in the system.It introduces the basic concepts and main types of carbon trading,and introduces the carbon trading into the integrated energy system to participate in the daily operation of the system.Finally,by setting the comparison scheme,it is verified that fully considering the uncertain factors in the system is conducive to improve the stability of the system operation,and the carbon trading can effectively improve the low-carbon energy supply characteristics of the system. |
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